Hi Glen,
I am amazed that your wife has been on ESA for so long without reassessment! Under normal circumstances (that is, when reassessments have not been deferred because of backlogs) the longest period before reassessment would be 3 years for those in the Support Group.
Legislation has certainly changed since your wife was first awarded ESA so you should pay careful attention to the guides.
www.benefitsandwork.co.uk/help-for-claimants/esa1 May I suggest that you bookmark/favourite this on your web browser now so that you can find it easily in future? This will allow you to return with further questions or comments about your wife's ESA without having to start a new topic each time. We ask members to keep everything relating to the same claim in one topic as it helps us enormously - and I hope you will find it useful too